| 北斗卫星伪距信号质量评估及偏差校正 |
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| 引用本文： | 倪少杰,王耀鼎,封欣,王飞雪.北斗卫星伪距信号质量评估及偏差校正[J].国防科技大学学报,2017,39(4):87-91. |
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| 作者姓名： | 倪少杰 王耀鼎 封欣 王飞雪 |
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| 作者单位： | 国防科学技术大学 电子科学与工程学院,武汉大学测绘学院,中国卫星导航定位应用管理中心,国防科学技术大学 电子科学与工程学院 |
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| 基金项目： | 国家自然科学基金资助项目（61403413） |
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| 摘 要： | 针对北斗卫星信号存在系统性伪距偏差的问题,从多路径角度评估北斗三频信号的质量,验证了该项偏差与卫星轨道类型、卫星仰角及信号频率有关。为消除这一系统性偏差的影响,采用连续分段线性函数建立北斗三频伪距偏差校正模型。与现有的改正模型所不同,所提模型不仅采用了更长时间范围内的北斗实测数据,更为重要的是它顾及了改正数的精度信息。基于动态精密单点定位的实验结果表明,采用所提方法修正后,接收机定位性能有明显提升。
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| 关 键 词： | 北斗卫星导航系统 伪距偏差 多路径 随机模型 精密单点定位 |
| 收稿时间： | 2016/1/29 0:00:00 |
| 修稿时间： | 2016/9/2 0:00:00 |
Beidou satellite pseudo-range signal quality assessmentand error correction |
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| NI Shaojie,WANG Yaoding,FENG Xin and WANG Feixue.Beidou satellite pseudo-range signal quality assessmentand error correction[J].Journal of National University of Defense Technology,2017,39(4):87-91. |
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| Authors: | NI Shaojie WANG Yaoding FENG Xin and WANG Feixue |
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| Institution: | 1. College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China,1. College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China,2. China National Administration of GNSS and Applications, Beijing 100088, China and 1. College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | Regarding to the problem of systematic pseudorange bias in BeiDou navigation system application,The pseudorange observations quality of Beidou triple frequency is analyzed from the multipath angle in the paper. It is found that the bias is related to the type of satellite orbit, satellite elevation angle and the signal frequency. A model for triple frequency correction pseudorange bias is established with the continuous piecewise linear function. Compared to the traditional correction model, the model proposed in this paper uses longer range of the Beidou measured data, and having regard to the accuracy of information of corrections. The correctness and superiority of the model are verified by the experimental results based on the dynamic precise point positioning. |
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| Keywords: | Beidou satellite navigation system pseudorange error multipath stochastic model precise point positioning |
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